Past sins

I have a long memory.

If you do something deliberately nasty to me then I'm likely to remember.

If, a few years later, you want something from me that is within my power to give, then you can get lost.

I won't necessarily let you know why; I just won't co-operate.

Actually, letting you know why did cross my mind and I thought that would be particularly satisfying, but I let it go.

So you've realised this isn't hypothetical. This is real. And it really didn't happen. And it really serves you right.